[Dovecot] ldap passdb + mdbox

[dmiller at amfes.com]

 On Tue, 23 Nov 2010 15:33:47 +0000, Timo Sirainen <tss at iki.fi> wrote:
> On Tue, 2010-11-23 at 07:30 -0800, dmiller at amfes.com wrote:
>> >> userdb {
>> >>    driver = ldap
>> >>    # symlink to dovecot-ldap.conf
>> >>    args = /usr/local/etc/dovecot/dovecot-ldap-userdb.conf
>> >> }
>> >
>> > The symlink isn't very useful. It'll just cause extra LDAP
>> > connections
>> > to be created, since that userdb is used only for iteration anyway
>> > and
>> > iterations are always executed in their own separate processes 
>> with
>> > separate LDAP connection.
>>
>>  Ok - I've returned to my normal state of confusion.  Prefetch
>>  documentation says I need an explicit userdb for LDA/LMTP use.
>
> Right.
>
>> And
>>  somewhere I read I wasn't supposed to use the exact same filename 
>> for
>>  both userdb & passdb - but a symlink was good.  What should I use
>>  instead?
>
> If you use the same filename, Dovecot uses the same LDAP connection 
> for
> userdb and passdb lookups. Whether that's good or bad depends on the
> situation. In your case it simply creates an extra LDAP connection 
> for
> userdb lookups, which is never used.

 Going back and reading the docs...again...

 Auth-binds recommends the different connections for asynchronous 
 lookups to be faster - but since I'm using prefetch no userdb lookup is 
 ever performed, so it's a wasted connection...got it.  Might want to add 
 a note to that effect in the auth-binds doc section, "This optimization 
 does not apply when using Prefetch for the userdb, as no lookup is 
 performed and having a separate LDAP connection defined for userdb use 
 is a waste."

 --
 Daniel